forked from jruby/jruby
/
RubyIO.java
4832 lines (4019 loc) · 179 KB
/
RubyIO.java
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/*
**** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2006 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004-2006 Charles O Nutter <headius@headius.com>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2006 Evan Buswell <ebuswell@gmail.com>
* Copyright (C) 2007 Miguel Covarrubias <mlcovarrubias@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the CPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the CPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby;
import org.jcodings.specific.UTF16BEEncoding;
import org.jcodings.specific.UTF16LEEncoding;
import org.jcodings.specific.UTF32BEEncoding;
import org.jcodings.specific.UTF32LEEncoding;
import org.jcodings.specific.UTF8Encoding;
import org.jruby.util.StringSupport;
import org.jruby.util.io.EncodingOption;
import org.jruby.util.io.ModeFlags;
import org.jruby.util.io.SelectBlob;
import jnr.constants.platform.Fcntl;
import java.io.EOFException;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.Channel;
import java.nio.channels.Channels;
import java.nio.channels.FileChannel;
import java.nio.channels.NonReadableChannelException;
import java.nio.channels.Pipe;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.WritableByteChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.jcodings.Encoding;
import org.jruby.anno.FrameField;
import org.jruby.anno.JRubyMethod;
import org.jruby.anno.JRubyClass;
import org.jruby.common.IRubyWarnings.ID;
import org.jruby.exceptions.RaiseException;
import org.jruby.ext.fcntl.FcntlLibrary;
import org.jruby.platform.Platform;
import org.jruby.runtime.Block;
import org.jruby.runtime.ClassIndex;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import static org.jruby.runtime.Visibility.*;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
import org.jruby.util.io.Stream;
import org.jruby.util.io.IOOptions;
import org.jruby.util.SafePropertyAccessor;
import org.jruby.util.ShellLauncher;
import org.jruby.util.TypeConverter;
import org.jruby.util.io.BadDescriptorException;
import org.jruby.util.io.ChannelStream;
import org.jruby.util.io.InvalidValueException;
import org.jruby.util.io.PipeException;
import org.jruby.util.io.FileExistsException;
import org.jruby.util.io.DirectoryAsFileException;
import org.jruby.util.io.STDIO;
import org.jruby.util.io.OpenFile;
import org.jruby.util.io.ChannelDescriptor;
import org.jcodings.specific.ASCIIEncoding;
import org.jruby.javasupport.util.RuntimeHelpers;
import org.jruby.runtime.Arity;
import static org.jruby.CompatVersion.*;
import static org.jruby.RubyEnumerator.enumeratorize;
import org.jruby.runtime.encoding.EncodingService;
import org.jruby.util.CharsetTranscoder;
/**
*
* @author jpetersen
*/
@JRubyClass(name="IO", include="Enumerable")
public class RubyIO extends RubyObject {
// This should only be called by this and RubyFile.
// It allows this object to be created without a IOHandler.
public RubyIO(Ruby runtime, RubyClass type) {
super(runtime, type);
openFile = new OpenFile();
}
public RubyIO(Ruby runtime, OutputStream outputStream) {
this(runtime, outputStream, true);
}
public RubyIO(Ruby runtime, OutputStream outputStream, boolean autoclose) {
super(runtime, runtime.getIO());
// We only want IO objects with valid streams (better to error now).
if (outputStream == null) {
throw runtime.newRuntimeError("Opening null stream");
}
openFile = new OpenFile();
try {
openFile.setMainStream(ChannelStream.open(runtime, new ChannelDescriptor(Channels.newChannel(outputStream)), autoclose));
} catch (InvalidValueException e) {
throw getRuntime().newErrnoEINVALError();
}
openFile.setMode(OpenFile.WRITABLE | OpenFile.APPEND);
}
public RubyIO(Ruby runtime, InputStream inputStream) {
super(runtime, runtime.getIO());
if (inputStream == null) {
throw runtime.newRuntimeError("Opening null stream");
}
openFile = new OpenFile();
try {
openFile.setMainStream(ChannelStream.open(runtime, new ChannelDescriptor(Channels.newChannel(inputStream))));
} catch (InvalidValueException e) {
throw getRuntime().newErrnoEINVALError();
}
openFile.setMode(OpenFile.READABLE);
}
public RubyIO(Ruby runtime, Channel channel) {
super(runtime, runtime.getIO());
// We only want IO objects with valid streams (better to error now).
if (channel == null) {
throw runtime.newRuntimeError("Opening null channel");
}
openFile = new OpenFile();
try {
openFile.setMainStream(ChannelStream.open(runtime, new ChannelDescriptor(channel)));
} catch (InvalidValueException e) {
throw getRuntime().newErrnoEINVALError();
}
openFile.setMode(openFile.getMainStream().getModes().getOpenFileFlags());
}
public RubyIO(Ruby runtime, ShellLauncher.POpenProcess process, IOOptions ioOptions) {
this(runtime, runtime.getIO(), process, null, ioOptions);
}
public RubyIO(Ruby runtime, RubyClass cls, ShellLauncher.POpenProcess process, RubyHash options, IOOptions ioOptions) {
super(runtime, cls);
ioOptions = updateIOOptionsFromOptions(runtime.getCurrentContext(), (RubyHash) options, ioOptions);
setEncodingFromOptions(ioOptions.getEncodingOption());
openFile = new OpenFile();
openFile.setMode(ioOptions.getModeFlags().getOpenFileFlags() | OpenFile.SYNC);
openFile.setProcess(process);
try {
if (openFile.isReadable()) {
Channel inChannel;
if (process.getInput() != null) {
// NIO-based
inChannel = process.getInput();
} else {
// Stream-based
inChannel = Channels.newChannel(process.getInputStream());
}
ChannelDescriptor main = new ChannelDescriptor(
inChannel);
main.setCanBeSeekable(false);
openFile.setMainStream(ChannelStream.open(getRuntime(), main));
}
if (openFile.isWritable() && process.hasOutput()) {
Channel outChannel;
if (process.getOutput() != null) {
// NIO-based
outChannel = process.getOutput();
} else {
outChannel = Channels.newChannel(process.getOutputStream());
}
ChannelDescriptor pipe = new ChannelDescriptor(
outChannel);
pipe.setCanBeSeekable(false);
if (openFile.getMainStream() != null) {
openFile.setPipeStream(ChannelStream.open(getRuntime(), pipe));
} else {
openFile.setMainStream(ChannelStream.open(getRuntime(), pipe));
}
}
} catch (InvalidValueException e) {
throw getRuntime().newErrnoEINVALError();
}
}
public RubyIO(Ruby runtime, STDIO stdio) {
super(runtime, runtime.getIO());
openFile = new OpenFile();
ChannelDescriptor descriptor;
Stream mainStream;
switch (stdio) {
case IN:
// special constructor that accepts stream, not channel
descriptor = new ChannelDescriptor(runtime.getIn(), newModeFlags(runtime, ModeFlags.RDONLY), FileDescriptor.in);
runtime.putFilenoMap(0, descriptor.getFileno());
mainStream = ChannelStream.open(runtime, descriptor);
openFile.setMainStream(mainStream);
break;
case OUT:
descriptor = new ChannelDescriptor(Channels.newChannel(runtime.getOut()), newModeFlags(runtime, ModeFlags.WRONLY | ModeFlags.APPEND), FileDescriptor.out);
runtime.putFilenoMap(1, descriptor.getFileno());
mainStream = ChannelStream.open(runtime, descriptor);
openFile.setMainStream(mainStream);
openFile.getMainStream().setSync(true);
break;
case ERR:
descriptor = new ChannelDescriptor(Channels.newChannel(runtime.getErr()), newModeFlags(runtime, ModeFlags.WRONLY | ModeFlags.APPEND), FileDescriptor.err);
runtime.putFilenoMap(2, descriptor.getFileno());
mainStream = ChannelStream.open(runtime, descriptor);
openFile.setMainStream(mainStream);
openFile.getMainStream().setSync(true);
break;
}
openFile.setMode(openFile.getMainStream().getModes().getOpenFileFlags());
// never autoclose stdio streams
openFile.setAutoclose(false);
}
public static RubyIO newIO(Ruby runtime, Channel channel) {
return new RubyIO(runtime, channel);
}
public OpenFile getOpenFile() {
return openFile;
}
protected OpenFile getOpenFileChecked() {
openFile.checkClosed(getRuntime());
return openFile;
}
private static ObjectAllocator IO_ALLOCATOR = new ObjectAllocator() {
public IRubyObject allocate(Ruby runtime, RubyClass klass) {
return new RubyIO(runtime, klass);
}
};
/*
* We use FILE versus IO to match T_FILE in MRI.
*/
@Override
public int getNativeTypeIndex() {
return ClassIndex.FILE;
}
public static RubyClass createIOClass(Ruby runtime) {
RubyClass ioClass = runtime.defineClass("IO", runtime.getObject(), IO_ALLOCATOR);
ioClass.index = ClassIndex.IO;
ioClass.setReifiedClass(RubyIO.class);
ioClass.kindOf = new RubyModule.KindOf() {
@Override
public boolean isKindOf(IRubyObject obj, RubyModule type) {
return obj instanceof RubyIO;
}
};
ioClass.includeModule(runtime.getEnumerable());
// TODO: Implement tty? and isatty. We have no real capability to
// determine this from java, but if we could set tty status, then
// we could invoke jruby differently to allow stdin to return true
// on this. This would allow things like cgi.rb to work properly.
ioClass.defineAnnotatedMethods(RubyIO.class);
// Constants for seek
ioClass.setConstant("SEEK_SET", runtime.newFixnum(Stream.SEEK_SET));
ioClass.setConstant("SEEK_CUR", runtime.newFixnum(Stream.SEEK_CUR));
ioClass.setConstant("SEEK_END", runtime.newFixnum(Stream.SEEK_END));
if (runtime.is1_9()) {
ioClass.defineModuleUnder("WaitReadable");
ioClass.defineModuleUnder("WaitWritable");
}
return ioClass;
}
public OutputStream getOutStream() {
try {
return getOpenFileChecked().getMainStreamSafe().newOutputStream();
} catch (BadDescriptorException e) {
throw getRuntime().newErrnoEBADFError();
}
}
public InputStream getInStream() {
try {
return getOpenFileChecked().getMainStreamSafe().newInputStream();
} catch (BadDescriptorException e) {
throw getRuntime().newErrnoEBADFError();
}
}
public Channel getChannel() {
try {
return getOpenFileChecked().getMainStreamSafe().getChannel();
} catch (BadDescriptorException e) {
throw getRuntime().newErrnoEBADFError();
}
}
@Deprecated
public Stream getHandler() throws BadDescriptorException {
return getOpenFileChecked().getMainStreamSafe();
}
protected void reopenPath(Ruby runtime, IRubyObject[] args) {
IRubyObject pathString;
if (runtime.is1_9()) {
pathString = RubyFile.get_path(runtime.getCurrentContext(), args[0]);
} else {
pathString = args[0].convertToString();
}
// TODO: check safe, taint on incoming string
try {
IOOptions modes;
if (args.length > 1) {
IRubyObject modeString = args[1].convertToString();
modes = newIOOptions(runtime, modeString.toString());
openFile.setMode(modes.getModeFlags().getOpenFileFlags());
} else {
modes = newIOOptions(runtime, "r");
}
String path = pathString.toString();
// Ruby code frequently uses a platform check to choose "NUL:" on windows
// but since that check doesn't work well on JRuby, we help it out
openFile.setPath(path);
if (openFile.getMainStream() == null) {
try {
openFile.setMainStream(ChannelStream.fopen(runtime, path, modes.getModeFlags()));
} catch (FileExistsException fee) {
throw runtime.newErrnoEEXISTError(path);
}
if (openFile.getPipeStream() != null) {
openFile.getPipeStream().fclose();
openFile.setPipeStream(null);
}
} else {
// TODO: This is an freopen in MRI, this is close, but not quite the same
openFile.getMainStreamSafe().freopen(runtime, path, newIOOptions(runtime, openFile.getModeAsString(runtime)).getModeFlags());
if (openFile.getPipeStream() != null) {
// TODO: pipe handler to be reopened with path and "w" mode
}
}
} catch (PipeException pe) {
throw runtime.newErrnoEPIPEError();
} catch (IOException ex) {
throw runtime.newIOErrorFromException(ex);
} catch (BadDescriptorException ex) {
throw runtime.newErrnoEBADFError();
} catch (InvalidValueException e) {
throw runtime.newErrnoEINVALError();
}
}
protected void reopenIO(Ruby runtime, RubyIO ios) {
try {
if (ios.openFile == this.openFile) return;
OpenFile origFile = ios.getOpenFileChecked();
OpenFile selfFile = getOpenFileChecked();
long pos = 0;
Stream origStream = origFile.getMainStreamSafe();
ChannelDescriptor origDescriptor = origStream.getDescriptor();
boolean origIsSeekable = origDescriptor.isSeekable();
if (origFile.isReadable() && origIsSeekable) {
pos = origFile.getMainStreamSafe().fgetpos();
}
if (origFile.getPipeStream() != null) {
origFile.getPipeStream().fflush();
} else if (origFile.isWritable()) {
origStream.fflush();
}
if (selfFile.isWritable()) {
selfFile.getWriteStreamSafe().fflush();
}
selfFile.setMode(origFile.getMode());
selfFile.setProcess(origFile.getProcess());
selfFile.setLineNumber(origFile.getLineNumber());
selfFile.setPath(origFile.getPath());
selfFile.setFinalizer(origFile.getFinalizer());
Stream selfStream = selfFile.getMainStreamSafe();
ChannelDescriptor selfDescriptor = selfFile.getMainStreamSafe().getDescriptor();
boolean selfIsSeekable = selfDescriptor.isSeekable();
// confirm we're not reopening self's channel
if (selfDescriptor.getChannel() != origDescriptor.getChannel()) {
// check if we're a stdio IO, and ensure we're not badly mutilated
if (runtime.getFileno(selfDescriptor) >= 0 && runtime.getFileno(selfDescriptor) <= 2) {
selfFile.getMainStreamSafe().clearerr();
// dup2 new fd into self to preserve fileno and references to it
origDescriptor.dup2Into(selfDescriptor);
} else {
Stream pipeFile = selfFile.getPipeStream();
int mode = selfFile.getMode();
selfFile.getMainStreamSafe().fclose();
selfFile.setPipeStream(null);
// TODO: turn off readable? am I reading this right?
// This only seems to be used while duping below, since modes gets
// reset to actual modes afterward
//fptr->mode &= (m & FMODE_READABLE) ? ~FMODE_READABLE : ~FMODE_WRITABLE;
if (pipeFile != null) {
selfFile.setMainStream(ChannelStream.fdopen(runtime, origDescriptor, origDescriptor.getOriginalModes()));
selfFile.setPipeStream(pipeFile);
} else {
// only use internal fileno here, stdio is handled above
selfFile.setMainStream(
ChannelStream.open(
runtime,
origDescriptor.dup2(selfDescriptor.getFileno())));
// since we're not actually duping the incoming channel into our handler, we need to
// copy the original sync behavior from the other handler
selfFile.getMainStreamSafe().setSync(selfFile.getMainStreamSafe().isSync());
}
selfFile.setMode(mode);
}
// TODO: anything threads attached to original fd are notified of the close...
// see rb_thread_fd_close
if (origFile.isReadable() && pos >= 0) {
if (selfIsSeekable) {
selfFile.seek(pos, Stream.SEEK_SET);
}
if (origIsSeekable) {
origFile.seek(pos, Stream.SEEK_SET);
}
}
}
// only use internal fileno here, stdio is handled above
if (selfFile.getPipeStream() != null && selfDescriptor.getFileno() != selfFile.getPipeStream().getDescriptor().getFileno()) {
int fd = selfFile.getPipeStream().getDescriptor().getFileno();
if (origFile.getPipeStream() == null) {
selfFile.getPipeStream().fclose();
selfFile.setPipeStream(null);
} else if (fd != origFile.getPipeStream().getDescriptor().getFileno()) {
selfFile.getPipeStream().fclose();
ChannelDescriptor newFD2 = origFile.getPipeStream().getDescriptor().dup2(fd);
selfFile.setPipeStream(ChannelStream.fdopen(runtime, newFD2, newIOOptions(runtime, "w").getModeFlags()));
}
}
// TODO: restore binary mode
// if (fptr->mode & FMODE_BINMODE) {
// rb_io_binmode(io);
// }
// TODO: set our metaclass to target's class (i.e. scary!)
} catch (IOException ex) { // TODO: better error handling
throw runtime.newIOErrorFromException(ex);
} catch (BadDescriptorException ex) {
throw runtime.newIOError("could not reopen: " + ex.getMessage());
} catch (PipeException ex) {
ex.printStackTrace();
throw runtime.newIOError("could not reopen: " + ex.getMessage());
} catch (InvalidValueException ive) {
throw runtime.newErrnoEINVALError();
}
}
@JRubyMethod(name = "reopen", required = 1, optional = 1)
public IRubyObject reopen(ThreadContext context, IRubyObject[] args) {
Ruby runtime = context.runtime;
IRubyObject tmp = TypeConverter.convertToTypeWithCheck(args[0], runtime.getIO(), "to_io");
if (!tmp.isNil()) {
reopenIO(runtime, (RubyIO) tmp);
} else {
reopenPath(runtime, args);
}
return this;
}
@Deprecated
public static ModeFlags getIOModes(Ruby runtime, String modesString) {
return newModeFlags(runtime, modesString);
}
@Deprecated
public static int getIOModesIntFromString(Ruby runtime, String modesString) {
try {
return ModeFlags.getOFlagsFromString(modesString);
} catch (InvalidValueException ive) {
throw runtime.newArgumentError("illegal access mode");
}
}
/*
* Ensure that separator is valid otherwise give it the default paragraph separator.
*/
private ByteList separator(Ruby runtime) {
return separator(runtime, runtime.getRecordSeparatorVar().get());
}
private ByteList separator(Ruby runtime, IRubyObject separatorValue) {
ByteList separator = separatorValue.isNil() ? null :
separatorValue.convertToString().getByteList();
if (separator != null) {
if (separator.getRealSize() == 0) return Stream.PARAGRAPH_DELIMETER;
if (runtime.is1_9()) {
if (separator.getEncoding() != getReadEncoding(runtime)) {
separator = CharsetTranscoder.transcode(runtime.getCurrentContext(), separator,
getInputEncoding(runtime), getReadEncoding(runtime), runtime.getNil());
}
}
}
return separator;
}
private ByteList getSeparatorFromArgs(Ruby runtime, IRubyObject[] args, int idx) {
return separator(runtime, args.length > idx ? args[idx] : runtime.getRecordSeparatorVar().get());
}
private ByteList getSeparatorForGets(Ruby runtime, IRubyObject[] args) {
return getSeparatorFromArgs(runtime, args, 0);
}
private IRubyObject getline(Ruby runtime, ByteList separator, ByteListCache cache) {
return getline(runtime, separator, -1, cache);
}
public IRubyObject getline(Ruby runtime, ByteList separator) {
return getline(runtime, separator, -1, null);
}
/**
* getline using logic of gets. If limit is -1 then read unlimited amount.
*
*/
public IRubyObject getline(Ruby runtime, ByteList separator, long limit) {
return getline(runtime, separator, limit, null);
}
private IRubyObject getline(Ruby runtime, ByteList separator, long limit, ByteListCache cache) {
return getlineInner(runtime, separator, limit, cache);
}
private IRubyObject getlineEmptyString(Ruby runtime) {
if (runtime.is1_9()) return RubyString.newEmptyString(runtime, getReadEncoding(runtime));
return RubyString.newEmptyString(runtime);
}
private IRubyObject getlineAll(Ruby runtime, OpenFile myOpenFile) throws IOException, BadDescriptorException {
RubyString str = readAll();
if (str.getByteList().length() == 0) return runtime.getNil();
incrementLineno(runtime, myOpenFile);
return str;
}
/**
* getline using logic of gets. If limit is -1 then read unlimited amount.
* mri: rb_io_getline_1 (mostly)
*/
private IRubyObject getlineInner(Ruby runtime, ByteList separator, long limit, ByteListCache cache) {
try {
boolean is19 = runtime.is1_9();
OpenFile myOpenFile = getOpenFileChecked();
myOpenFile.checkReadable(runtime);
myOpenFile.setReadBuffered();
boolean isParagraph = separator == Stream.PARAGRAPH_DELIMETER;
separator = isParagraph ? Stream.PARAGRAPH_SEPARATOR : separator;
if (isParagraph) swallow('\n');
if (separator == null && limit < 0) {
return getlineAll(runtime, myOpenFile);
} else if (limit == 0) {
return getlineEmptyString(runtime);
} else if (separator != null && separator.length() == 1 && limit < 0 &&
(!is19 || (!needsReadConversion() && getReadEncoding(runtime).isAsciiCompatible()))) {
return getlineFast(runtime, separator.get(0) & 0xFF, cache);
} else {
Stream readStream = myOpenFile.getMainStreamSafe();
int c = -1;
int n = -1;
int newline = (separator != null) ? (separator.get(separator.length() - 1) & 0xFF) : -1;
// FIXME: Change how we consume streams to match MRI (see append_line/more_char/fill_cbuf)
// Awful hack. MRI pre-transcodes lines into read-ahead whereas
// we read a single line at a time PRE-transcoded. To keep our
// logic we need to do one additional transcode of the sep to
// match the pre-transcoded encoding. This is gross and we should
// mimick MRI.
if (is19 && separator != null && separator.getEncoding() != getInputEncoding(runtime)) {
separator = CharsetTranscoder.transcode(runtime.getCurrentContext(), separator, separator.getEncoding(), getInputEncoding(runtime), null);
newline = separator.get(separator.length() - 1) & 0xFF;
}
ByteList buf = cache != null ? cache.allocate(0) : new ByteList(0);
try {
ThreadContext context = runtime.getCurrentContext();
boolean update = false;
boolean limitReached = false;
if (is19) makeReadConversion(context);
while (true) {
do {
readCheck(readStream);
readStream.clearerr();
try {
runtime.getCurrentContext().getThread().beforeBlockingCall();
if (limit == -1) {
n = readStream.getline(buf, (byte) newline);
} else {
n = readStream.getline(buf, (byte) newline, limit);
limit -= n;
if (limit <= 0) {
update = limitReached = true;
break;
}
}
c = buf.length() > 0 ? buf.get(buf.length() - 1) & 0xff : -1;
} catch (EOFException e) {
n = -1;
} finally {
runtime.getCurrentContext().getThread().afterBlockingCall();
}
// CRuby checks ferror(f) and retry getc for
// non-blocking IO.
if (n == 0) {
waitReadable(readStream);
continue;
} else if (n == -1) {
break;
}
update = true;
} while (c != newline); // loop until we see the nth separator char
// if we hit EOF or reached limit then we're done
if (n == -1 || limitReached) {
break;
}
// if we've found the last char of the separator,
// and we've found at least as many characters as separator length,
// and the last n characters of our buffer match the separator, we're done
if (c == newline && separator != null && buf.length() >= separator.length() &&
0 == ByteList.memcmp(buf.getUnsafeBytes(), buf.getBegin() + buf.getRealSize() - separator.length(), separator.getUnsafeBytes(), separator.getBegin(), separator.getRealSize())) {
break;
}
}
if (is19) buf = readTranscoder.transcode(context, buf);
if (isParagraph && c != -1) swallow('\n');
if (!update) return runtime.getNil();
incrementLineno(runtime, myOpenFile);
return makeString(runtime, buf, cache != null);
}
finally {
if (cache != null) cache.release(buf);
}
}
} catch (InvalidValueException ex) {
throw runtime.newErrnoEINVALError();
} catch (EOFException e) {
return runtime.getNil();
} catch (BadDescriptorException e) {
throw runtime.newErrnoEBADFError();
} catch (IOException e) {
throw runtime.newIOErrorFromException(e);
}
}
// mri: io_read_encoding
private Encoding getReadEncoding(Ruby runtime) {
return readEncoding != null ? readEncoding : runtime.getDefaultExternalEncoding();
}
// mri: io_input_encoding
private Encoding getInputEncoding(Ruby runtime) {
return writeEncoding != null ? writeEncoding : getReadEncoding(runtime);
}
private RubyString makeString(Ruby runtime, ByteList buffer, boolean isCached) {
ByteList newBuf = isCached ? new ByteList(buffer) : buffer;
if (runtime.is1_9()) newBuf.setEncoding(getReadEncoding(runtime));
RubyString str = RubyString.newString(runtime, newBuf);
str.setTaint(true);
return str;
}
private void incrementLineno(Ruby runtime, OpenFile myOpenFile) {
int lineno = myOpenFile.getLineNumber() + 1;
myOpenFile.setLineNumber(lineno);
runtime.setCurrentLine(lineno);
RubyArgsFile.setCurrentLineNumber(runtime.getArgsFile(), lineno);
}
protected boolean swallow(int term) throws IOException, BadDescriptorException {
Stream readStream = openFile.getMainStreamSafe();
int c;
do {
readCheck(readStream);
try {
c = readStream.fgetc();
} catch (EOFException e) {
c = -1;
}
if (c != term) {
readStream.ungetc(c);
return true;
}
} while (c != -1);
return false;
}
private static String vendor;
static { String v = SafePropertyAccessor.getProperty("java.vendor") ; vendor = (v == null) ? "" : v; };
private static String msgEINTR = "Interrupted system call";
public static boolean restartSystemCall(Exception e) {
return vendor.startsWith("Apple") && e.getMessage().equals(msgEINTR);
}
private IRubyObject getlineFast(Ruby runtime, int delim, ByteListCache cache) throws IOException, BadDescriptorException {
Stream readStream = openFile.getMainStreamSafe();
int c = -1;
ByteList buf = cache != null ? cache.allocate(0) : new ByteList(0);
try {
boolean update = false;
do {
readCheck(readStream);
readStream.clearerr();
int n;
try {
runtime.getCurrentContext().getThread().beforeBlockingCall();
n = readStream.getline(buf, (byte) delim);
c = buf.length() > 0 ? buf.get(buf.length() - 1) & 0xff : -1;
} catch (EOFException e) {
n = -1;
} finally {
runtime.getCurrentContext().getThread().afterBlockingCall();
}
// CRuby checks ferror(f) and retry getc for non-blocking IO.
if (n == 0) {
waitReadable(readStream);
continue;
} else if (n == -1) {
break;
}
update = true;
} while (c != delim);
if (!update) return runtime.getNil();
incrementLineno(runtime, openFile);
return makeString(runtime, buf, cache != null);
} finally {
if (cache != null) cache.release(buf);
}
}
// IO class methods.
@JRubyMethod(name = {"new", "for_fd"}, rest = true, meta = true)
public static IRubyObject newInstance(ThreadContext context, IRubyObject recv, IRubyObject[] args, Block block) {
RubyClass klass = (RubyClass)recv;
if (block.isGiven()) {
String className = klass.getName();
context.runtime.getWarnings().warn(
ID.BLOCK_NOT_ACCEPTED,
className + "::new() does not take block; use " + className + "::open() instead");
}
return klass.newInstance(context, args, block);
}
private IRubyObject initializeCommon19(ThreadContext context, int fileno, IRubyObject options, IOOptions ioOptions) {
Ruby runtime = context.runtime;
try {
ChannelDescriptor descriptor = ChannelDescriptor.getDescriptorByFileno(runtime.getFilenoExtMap(fileno));
if (descriptor == null) throw runtime.newErrnoEBADFError();
descriptor.checkOpen();
if (options != null && !(options instanceof RubyHash)) {
throw context.runtime.newTypeError(options, runtime.getHash());
}
if (ioOptions == null) {
ioOptions = newIOOptions(runtime, descriptor.getOriginalModes());
}
ioOptions = updateIOOptionsFromOptions(context, (RubyHash) options, ioOptions);
setEncodingFromOptions(ioOptions.getEncodingOption());
if (ioOptions == null) ioOptions = newIOOptions(runtime, descriptor.getOriginalModes());
if (openFile.isOpen()) {
// JRUBY-4650: Make sure we clean up the old data,
// if it's present.
openFile.cleanup(runtime, false);
}
openFile.setMode(ioOptions.getModeFlags().getOpenFileFlags());
openFile.setMainStream(fdopen(descriptor, ioOptions.getModeFlags()));
} catch (BadDescriptorException ex) {
throw getRuntime().newErrnoEBADFError();
}
return this;
}
@JRubyMethod(name = "initialize", visibility = PRIVATE, compat = RUBY1_9)
public IRubyObject initialize19(ThreadContext context, IRubyObject fileNumber, Block unused) {
return initializeCommon19(context, RubyNumeric.fix2int(fileNumber), null, null);
}
@JRubyMethod(name = "initialize", visibility = PRIVATE, compat = RUBY1_9)
public IRubyObject initialize19(ThreadContext context, IRubyObject fileNumber, IRubyObject second, Block unused) {
int fileno = RubyNumeric.fix2int(fileNumber);
IOOptions ioOptions = null;
RubyHash options = null;
if (second instanceof RubyHash) {
options = (RubyHash)second;
} else {
ioOptions = parseIOOptions19(second);
}
return initializeCommon19(context, fileno, options, ioOptions);
}
@JRubyMethod(name = "initialize", visibility = PRIVATE, compat = RUBY1_9)
public IRubyObject initialize19(ThreadContext context, IRubyObject fileNumber, IRubyObject modeValue, IRubyObject options, Block unused) {
int fileno = RubyNumeric.fix2int(fileNumber);
IOOptions ioOptions = parseIOOptions19(modeValue);
return initializeCommon19(context, fileno, options, ioOptions);
}
// No encoding processing
protected IOOptions parseIOOptions(IRubyObject arg) {
Ruby runtime = getRuntime();
if (arg instanceof RubyFixnum) return newIOOptions(runtime, (int) RubyFixnum.fix2long(arg));
return newIOOptions(runtime, newModeFlags(runtime, arg.convertToString().toString()));
}
// Encoding processing
protected IOOptions parseIOOptions19(IRubyObject arg) {
Ruby runtime = getRuntime();
if (arg instanceof RubyFixnum) return newIOOptions(runtime, (int) RubyFixnum.fix2long(arg));
String modeString = arg.convertToString().toString();
try {
return new IOOptions(runtime, modeString);
} catch (InvalidValueException ive) {
throw runtime.newArgumentError("invalid access mode " + modeString);
}
}
@JRubyMethod(required = 1, optional = 1, visibility = PRIVATE, compat = RUBY1_8)
public IRubyObject initialize(IRubyObject[] args, Block unusedBlock) {
Ruby runtime = getRuntime();
int argCount = args.length;
IOOptions ioOptions;
int fileno = RubyNumeric.fix2int(args[0]);
try {
ChannelDescriptor descriptor = ChannelDescriptor.getDescriptorByFileno(runtime.getFilenoExtMap(fileno));
if (descriptor == null) {
throw runtime.newErrnoEBADFError();
}
descriptor.checkOpen();
if (argCount == 2) {
if (args[1] instanceof RubyFixnum) {
ioOptions = newIOOptions(runtime, RubyFixnum.fix2long(args[1]));
} else {
ioOptions = newIOOptions(runtime, args[1].convertToString().toString());
}
} else {
// use original modes
ioOptions = newIOOptions(runtime, descriptor.getOriginalModes());
}
if (openFile.isOpen()) {
// JRUBY-4650: Make sure we clean up the old data,
// if it's present.
openFile.cleanup(runtime, false);